2892503 - E2031 REAR FOG LAMPS - Functional description

Functional description

The electronic device located inside the switch unit H90 controls the rear fog lamps circuit. The button - in the actual unit H90 - sends the operating signal to this device, which receives the supply controlled by the ignition INT (pin 6 for connector A of H90) from the line protected by fuse F8 of the junction unit B1. The device only controls the supply of the rera fog lamp (from pin 7 of connector A) in the left rear light cluster F30 (pin 1) if one of the two go ahead signals from the dipped headlamps or the fog lamps arrives. The first signal (dipped headlamps on) arrives from the steering column switch unit H5 to pin 8 of connector A: it is a supply controlled by the ignition (INT) for the line protected by fuse F8 of the junction unit B1. The second signal (fog lamps on) is supplied by the internal circuit for the unit H90.With the rear fog lamps switched on, a signal also lights up the control button. The entire control unit H90 is lit when the ignition is switched on (INT/A) by the line (pin 5 of connector A) protected by fuse B27.